4.11c. Use of LS-671
Loudspeaker, LS-671, is a part of selected installation kits. (See
SB 11-131-2 for a listing of individual kits.)
The primary purpose of the LS-671 is to allow for remote transmitting
and receiving of voice communications to the length of the LS-671
cable (CX-13292) being used. Cables are available in lengths varying
from 3 to 100 feet.
At the LS-671, these functions can be performed (see Figure 4-28,
below for controls available):
Radio can be turned ON and OFF by use of the power switch.
By connecting a handset to the LS-671 (J2), the radio can be
keyed and messages transmitted.
Net traffic can be monitored by proper adjustment of the
loudspeaker volume control.
Figure 4-28. Loudspeaker, LS-671
The remote capabilities of the LS-671 complement rather than replace
those of the RCU. Where the RCU supports remote operation up to 4
KM, the LS-671 is limited to 100 feet at most. Also, the LS-671
provides for only the most basic radio control functions.
The LS-671 is extremely useful for command posts and fire control
centers where operations personnel are performing other than radio
operator functions. The limited remote capability of the LS-671
enables such personnel to operate the radio from their work station
with minimum effort or movement, Only occasionally is it necessary for
a crewmember to move to the radio front panel to make control setting